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Effects of the intermediate gas injection on the performance of heat pump with an economizer.

[In Chinese. / En chinois.]

Author(s) : WANG W., MAO X., HU B., et al.

Type of article: Article

Summary

Theoretical analysis of a heat pump with an economizer have been presented in this paper. The mathematic models of the heat pump system have been developed and experiments have been conducted to investigate the impacts of the gas injection on heat pump performance under low ambient temperatures. The results indicate that the heating capacity and the power consumption go up when the amount of gas injection increases under low ambient temperatures. The discharge temperature declines with the increment of gas injection, while the COP of the heat pump rises first and then descends. According to the test results, the optimal amount of gas injection is about 10%-14% of the total mass flow rate in the heat pump system.

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Pages: 40-46

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